kern/152208: FreeBSD 8+bce network=network stalls

[Wojciech Puchar]

>Number:         152208
>Category:       kern
>Synopsis:       FreeBSD 8+bce network=network stalls
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Nov 13 16:40:08 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Wojciech Puchar
>Release:        8.1-STABLE
>Organization:
TENSOR ap
>Environment:
FreeBSD ****.pl 8.1-STABLE FreeBSD 8.1-STABLE #0: Fri Oct 22 22:50:17 CEST 2010     root@****.pl:/usr/src/sys/amd64/compile/****.pl  amd64

>Description:
machine have 2 bce interfaces both on board.
one is used as WAN other as LAN (IP 10.20.40.1)
i use ipfw with pipes and queues.

it worked fine under FreeBSD 7.3
With new FreeBSD i'm getting problem like 10.20.40.1 not responding LOCALLY.
i can ping it from any computer at local network, but when i log in into server and do 

ping 10.20.40.1

i'm getting no buffer space available.

ifconfig bce1 down;sleep 1;ifconfig bce1 up
"fixes" the problem until next some hours, sometimes few days but never more.

ipfw and network configuration was not changed even a bit after moving from 7.3

i use FreeBSD 8 on other machines but not with bce interfaces with similar style ipfw configuration, without any problems.

I'm not sure it is ipfw related, as i can't stop ipfw for test (it's production machine). i just added workaround now to reset bce1 every 10 minutes.
>How-To-Repeat:
use bce interfaces with FreeBSD 8 and ipfw.

I am not 100% sure if it's related to bce1 but i have such problem only on THAT server which was running fine with FreeBSD 7
(but slower, ahci driver from 8.* is really worth of update)
>Fix:
no idea what it is. adapter is actually working, it's some kind of routing/ipfw problem.

please reply  to e-mail if you need detailed configuration.

>Release-Note:
>Audit-Trail:
>Unformatted: